i may have made body filler mistake?

Hello guys,....

This is my first time posting on the forum... and infact my first time doing a fiberglass/body filler project.  I am in the process of building a gauge pod for my Impala.  It was working out really well.  I covered it with an old shirt and put the resin on... it hardened really well and looked good.  Then I took 80 grit and gave it a light scuffing.  Then I mixed body filler and resin 5:1.... and put it on the pods... but I didn't put nearly enough hardner.  So after I realized that I screwed up I decided to wipe it all down with a clean rag.  I got as much as I could off but it was still a mess.  So I mixed the body filler and resin again this time with the right amount of hardner and put it on.  It came out alright but I am wondering... will the light amount of body filler that is not mixed with hardner underneath harden with the new properly mixed body filler on top.  I am only asking because I know that you hit it with 80 before putting it on so that the body  filler bites and holds.  I am worried about this filler cracking or chipping underneath.  Should I be concerned or am I out of my mind.   Also, I need to build the surface up a bit.  Can I keep sanding and adding body filler???

Thanks,

Dan