Pat, it's pretty common and it's pretty unavoidable if you remain at Induction level carbs. Remember all that water weight you lost at the outset? That water was held in your cells because of the carbs you used to eat. Carbs in the body are stored as muscle glycogen, LCing depletes muscle glycogen stores w/in the first few days, resulting in a water weight drop and flatter muscles.

Intense exercise on <20g of carbs a day is next to impossible for most of us; it leads to what we commonly call 'bonking' and it's not fun! You might try increasing carbs around workouts, pre usually does it, or increasing carbs throughout the whole day. Or you can nix the intense exercise for a while and just do Induction, returning to the workouts when you hit OWL and have raised carbs.

HTH
Nat