Topband: Inv-L swr changing when adding radials

[Dan Bookwalter]

I installed an Inv-L for 160 of about 134ft , ~72 feet vertical , when i checked the SWR initially it was about 1.2:1 , then when i connected the ground rods it rose to 1.5:1 , today I added the first  2 radials and the SWR is now 2:1. The antenna is being fed directly , my question is basically what is this telling me ?  I assume I need to change the way I am feeding the antenna and possibly change its length.

any help appreciated...

Dan N8DCJ