Why is this?

When introducing my male and female one is always wandering and the other is lazy. During the first introduction i put the male in the females tub and the female just lays there and the male wonders around. So the second time around i put the female in the males tub and the male lays there and the female wonders around. Would it work to put them in a nuetral site so they both are active. Her tub is heating by a 75W night bulb and his is heated by an UTH.

How long are you leaving them alone together?

not every introduction results in a lock. The female is likely the cause if you don't get locks I find male are almost always ready.

put him in there and leave him in there for 2-3 days. dont bother them often. they stay locked up for hours (or days) so there is no need to be constantly looking

being active is not a sign of anything other than exploring a new place.

keep at it you will eventually get your locks.. no hurry here it takes months and months before you will get eggs.

Im leaving them together for 3 days off for 2 days to feed then back on

Try leaving them in for more then 3 days.... sometimes a few more or a week does the trick.