AC problem

[Delorean17@xxxx]

Hi List,
Last week I had my D's AC system evacuated and recharged with r-12. 
Amazingly it blows cold!. On Wednesday I took the car on a small road trip 
up to the UP of Michigan. It was about 95 degrees (VERY Humid) so the AC was 
on for the majority of the trip up; so about 4 hours. It stayed very cool 
and I had no problems at all. When I got out and opened the passenger door I 
couldn't believe it. There was almost 2 inches of water on the passenger 
floor. I took it to the car wash and vacuumed it out. When I came home I 
removed the seat and dried the carpet.
How can I fix this problem? The first week with AC I usually had a large 
puddle of water on the garage floor once I parked the car after the AC had 
been on. Now I don't have a puddle on the ground but in my car. I removed 
the glove box, knee pad and I cant really see where it is coming from. Any 
help would be greatly appreciated. Ps. My compressor cycles on/off every 9 
seconds for the first 5 mins and then it takes much longer to cycle once its 
been on for a bit. Do I need to add more freon? 

Thank You all
David
IN2TIME-MICH