I just wanted to let you all know that we will be visiting the aforementioned chapel tomorrow for confession and mass. As for confession, what do we do? I mean, if most of our previous confessions were doubtful at best due to potentially invalid rites of ordination/consecration, at what point in time do we start confessing our sins? Also, do we confess the weeks we didn't go to mass because there was only VII masses?
Since you will be there before mass, and probably do not want to hold up the line on Sunday morning...
You should know that God supplies the grace in cases where we think one is a priest but we were mislead or unaware of circuмstances. Quickly tell the priest of the circuмstance and ask him if you can make a confession since your last confession, and ask him if it would be alright if you were to make a general confession either after mass, or at a scheduled time. He might tell you what he would like for you to do, I'm sure you can work something out.
Not going to a mass that you believe is doubtful or not a Catholic rite is not a sin, but failing to sanctify the day, through prayer and rest, is a sin.
I'm not following. Is a "general confession" different than confession?
The timing is as such: 3:30 confession; 4PM mass and then after mass we have a 3 1/2 hour drive back home.
Also, I have had to prepare for a graduate course on Sundays as I need at least a 4 hour slot to be productive (and I work full time). Saturdays are usually set aside for chores. I do try to keep Sundays as "work free". I hope that doing my graduate course is not a sin.
Studying is not work. Work means unnecessary servile labor.
A general confession is made since your last general confession. You don't make them often, they basically go over your whole life and confessions, since your last general confession. People make them a few times in their life, before getting married, to prepare for the sacrament might be an example, or if one has a radical interior conversion.
Regular confession would be what you are already used to, but a general confession might take care on any nagging doubts you might have about previous confessions. They might not be founded but at least you can put your heart and mind at rest.
You don't even have to do that, I'm just giving suggestions. I'm sure the priest will be willing to give input. Call ahead if you want to, maybe he can help you beforehand.