Any target coupon with a store code and an online code can be used twice. Recently, I used the the 50$ off 100$ coupon which I received for my target red credit card card. The trick is to save the online code on your account and use the coupon first instore. Once you have used it instore, you can use the same again online that you had saved. I tried the same trick again with another coupon I received in the mail, this time it was a 5$ GC for 25+ spent on toys. I was able to use it instore as well as online. Again YMMV but I was able to replicate it with my wife's account as well.
I have tried this only on paper coupons that I received in the mail. So, I am not sure about the digital coupons.
Steps to follow:
1) save online code in your target.com account. this can be done by adding anything to your cart and entering code at checkout. DO NOT USE CODE YET.
2) use the instore coupon code in the store to make a purchase.
3) Once instore purchase has been completed, now use the coupon in your target.com account.