Forks were leaking from the top!!!

So I got out for a ride today & found fluid coming from the upper portion of both forks at the upper tree. At first I thought it was from the fork seals, so I pulled over & wiped both legs down. As I started ridding again I noticed fluid appearing from the lower side of the upper tree. D@mmed if the forks weren't leaking from the top. I bought this bike (07 FXSTC) about a month ago & and the previous owner raked with Pro One trees & extended the front end by about 4". He also added 18" apes & braided lines. I don't no who did the work as this was a repo & I purchased it from a 'car dealer' who got 4 of them last year. I got the bike for a song & have had to put a little work into it, but nothing major...
So tonight I rip the front end off & lowered the legs in the the clamps to see what seals needed to be replaced. The Pro One upper tree covers the top of the fork leg. Once the top of the forks were visible, I found that the brass fill screws were backed off with the right side backed out to the point were it would have fallen out if not capped by the upper tree.
First the B@tch: I wish shade tree mechanics would stick to shopping carts! As I found not only this problem but wheel spacers installed backwards, the axle torque wrong & pinch bolts just barely snugged up. Had the bike safetied & thought I went through it fairly thoroughly myself, I guess not enough.
Second, the question: The filler screws are now correctly seated, but conceivably how much fluid could I have lost? (slight seep) & could I have anyway damaged anything internally in the forks by ridding this way for the last month / 1300 miles? Although the problem wasn't evident until a couple of weeks ago; now that I figured out that all those rain drops may have not been all rain...

Here's where it's probably going to get cute: The lowers are factory for sure, the chrome sliders are not. Different set up on top than manual & I believe 4'' extended with these ones. I put the bike back together before I this posted this thread (naturally) & will have to take over to a dealer or the local Tim Hortons to compare the length. The remove & install on the front end probably took about 3 1/2 hours shop time & 2 whiskys & ice after. Not a big deal to pull it apart again to do a proper service, just not sure how much fluid is needed as compared to stock. My avatar is the baby I'm talking about, if you didn't already know...

Just going to finish second coffee & take it out for a test ride. It never bottomed out & or gave any weird handling characteristics, other than a little more dive than normal with braking. That is a little hard for me to judge though, as this is my first Softail & it's not stock. I knocked that up to the loose filler screws. It hasn't done so stationary after the reinstall. I will definitely service the forks again, but just want to make sure leaks are gone. I have to agree that it was a blessing in disguise, as I hadn't realized a monkey had messed with it... Assuming people know what they are doing could kill ya!

Will do & thanks for the advice. Is there a rough formula for the ratio of amount of extra fluid needed from stock levels to the amount of extension on the slider (inside diameter of tube remaining the same as stock) to the weight of the rider? Will use factory specs for servicing.

Ok just got back from a test ride. No leaks, less dive & better feel of the road. Not so spongy anymore... And if possible because of the original hack job installation, the front end feels tighter. Nothing came loose or wondered south, but I'll definitely be keeping an eye on things out front! I let you know how it goes...

Thanks Again. Actually been a very good bike so far. Any issues I've had so far could be handle out of my own garage with no extra tooling needed. Highest cost of a part for any fix has been about 7 bucks. An exhaust gasket on the rear jug... Knock on wood that it stays that way!

In my 03 Dyna manual, it list's two ways to fill the forks with oil.
One way is to put in a measured amount, FXD 10.6 oz, or with the spring removed, fully compressed, measure down from the top of tube to the oil. FXD is 6.69 inches.
On your bike the measurement or amount maybe different, check your service manual. With the extended forks I would use the measurement instead of the amount. A longer fork tube will need more oil. The balance of the amount of oil versus the amount of air above the oil will effect the action of the fork.
The air acts like a cushion. The smaller amount of air will compress less than a larger amount. This makes the fork a bit firmer.
Sport bikes often use an air fork and air shocks to be able to adjust the firmness of the suspension in a quick and easy way. It can be done by juggling the amount and weight of the fork oil or adjusting the compression and rebound of the forks and shocks. Being able to add a or release air pressure is much faster and easier.